doc: add and improve comments

pkg/models/client.go

@@ -6,19 +6,21 @@ import (
 	"sync"
 )
 
-// ClientCommand represents a command from the client (start/stop).
+// Represents a command from the client (start/stop)
 type ClientCommand struct {
-	Command  string         `json:"command"`  // comman send to the server
-	Password string         `json:"password"` // pomodoro control password
-	Settings PomodoroConfig `json:"settings"` // pomodoro config
+	Command  string         `json:"command"`  // Command send to the server
+	Password string         `json:"password"` // Pomodoro control password
+	Settings PomodoroConfig `json:"settings"` // Pomodoro config
 }
 
+// Represents a single client
 type Client struct {
-	Conn  *websocket.Conn
-	Mutex sync.Mutex
+	Conn  *websocket.Conn // Websocket connection of the client
+	Mutex sync.Mutex      // Mutex used to lock
 }
 
-// It automatically locks and unlocks the mutex to ensure that only one goroutine can write at a time.
+// Sends a message to the websocket.
+// Automatically locks and unlocks the client mutex, to ensure that only one goroutine can write at a time.
 func (c *Client) SendMessage(messageType int, data []byte) error {
 	c.Mutex.Lock()
 	defer c.Mutex.Unlock()